The Octadecanoic acid,1,1'-(oxydi-2,1-ethanediyl) ester, with the CAS registry number 109-30-8, is also known as Diethylene glycol distearate. Its EINECS number is 203-663-6. This chemical's molecular formula is C₄₀H₇₈O₅ and molecular weight is 639.04. What's more, its IUPAC name is 2-(2-octadecanoyloxyethoxy)ethyl octadecanoate. It is used as emulsifiers, artificial pearlisers in textile industry. When using it, you need avoid contacting with skin and eyes.

Physical properties of Octadecanoic acid,1,1'-(oxydi-2,1-ethanediyl) ester are: (1)ACD/LogP: 16.92; (2)# of Rule of 5 Violations: 2; (3)ACD/LogD (pH 5.5): 16.92; (4)ACD/BCF (pH 5.5): 1000000; (5)ACD/KOC (pH 5.5): 10000000; (6)#H bond acceptors: 5; (7)#H bond donors: 0; (8)#Freely Rotating Bonds: 40; (9)Polar Surface Area: 61.83 Å²; (10)Index of Refraction: 1.46; (11)Molar Refractivity: 192.65 cm³; (12)Molar Volume: 702.1 cm³; (13)Surface Tension: 33.7 dyne/cm; (14)Density: 0.91 g/cm³; (15)Flash Point: 262.1 °C; (16)Enthalpy of Vaporization: 97.97 kJ/mol; (17)Boiling Point: 666.4 °C at 760 mmHg; (18)Vapour Pressure: 1.27E-17 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)Canonical SMILES: CCCCCCCCCCCCCCCCCC(=O)OCCOCCOC(=O)CCCCCCCCCCCCCCCCC
(2)InChI: InChI=1S/C40H78O5/c1-3-5-7-9-11-13-15-17-19-21-23-25-27-29-31-33-39(41)
44-37-35-43-36-38-45-40(42)34-32-30-28-26-24-22-20-18-16-14-12-10-8-6-4-2/h3-38H2,1-2H3
(3)InChIKey: YKDMBTQVKVEMSA-UHFFFAOYSA-N